Shaft seal assembly for wastewater treatment water pump

Abstract

The utility model discloses a shaft sealing assembly for a wastewater treatment water pump. The shaft sealing assembly comprises a shaft, a sealing shell, a sealing shell cover, a movable ring, a plurality of springs, a sealing ring and the like. The first spring is installed at the bottom end in the sealing shell and pressed through the pressure ring, the upper end of the pressure ring is connected with the movable ring, and the upper portion and the lower portion of the movable ring are connected with the spring lower top cover and the sealing ring respectively. The spring upper top cover and the spring lower top cover tightly press the second spring, and the sealing shell cover is connected with the shell through a lengthened bolt. Holes consistent with the cross section of the shaft are formed in the middle of each component, and sealing rings are arranged at multiple positions. During installation, the assembly needs to be kept clean and free of damage, and all parts are installed according to steps. The two-way spring of the assembly can maintain uniform pressure of the sealing face, waste water leakage risks and noise are reduced, mounting and dismounting are convenient through the connecting mode, the bottom end of the sealing shell is tightly attached to the water pump, and universality is high.

Description

Technical Field

[0001] The utility model relates to the field of pump shaft seals, and particularly to a shaft seal assembly for a wastewater treatment pump. Background Technique

[0002] In traditional pump shaft seal technologies, common ones include packing seals and mechanical seals. A packing seal realizes sealing by filling a soft material, such as asbestos rope, graphite, etc., between the shaft and the stuffing box. However, this sealing method has many deficiencies. The friction between the packing and the shaft is relatively large, which easily causes wear of the shaft and increases energy consumption; moreover, for wastewater containing particles, the packing is easily worn, and the sealing effect will rapidly decline. A mechanical seal realizes sealing through the tight fit of a dynamic ring and a static ring to prevent fluid leakage in rotating machinery. But in a wastewater treatment environment, mechanical seals also face some problems. On the one hand, the vibration during use will cause the pressure distribution on the sealing surface between the dynamic ring and the static ring to lose balance. Sometimes the local pressure is too high, resulting in excessive wear, and sometimes the local pressure is too low to effectively prevent leakage. Long-term vibration may also cause displacement or misalignment of various components in the seal assembly, such as springs, dynamic rings, static rings, etc. The spring may deviate from its initial installation position, and the dynamic ring and the static ring may no longer be accurately aligned, which seriously damages the integrity of the sealing structure, thereby leading to seal failure and affecting the normal operation of the pump and the wastewater treatment effect. Due to the corrosiveness of the wastewater, the materials of the seal assembly are easily eroded, shortening the service life, and the components need to be frequently replaced. Traditional shaft seal assemblies often do not fully consider the convenience of installation and maintenance. When replacing the seal assembly, a large number of components may need to be disassembled, consuming a large amount of time and manpower. To address these problems, in recent years, researchers have continuously explored new shaft seal assembly technologies. Content of the Utility Model

[0003] The purpose of the utility model is to provide a shaft seal assembly for a wastewater treatment pump, which achieves a good anti-vibration effect through a spring installed bidirectionally, thereby preventing displacement or misalignment, and uses a sealing outer shell cover and a flange of the sealing outer shell to be threadedly connected through an extended bolt, facilitating the installation and disassembly of the assembly. When maintenance or component replacement is required, the operation is relatively simple, saving time and labor costs.

[0004] To achieve the above object, the present utility model provides the following technical solution: A shaft seal assembly for a wastewater treatment water pump, comprising a shaft (1), a seal housing (8), a seal housing cover (2), a dynamic ring (4), a plurality of springs, and a plurality of sealing rings, characterized in that: it further comprises a pressure ring (5), an extension bolt (7), a spring upper cover (31), and a spring lower cover (33); the seal housing (8) is a cylindrical body, and a first spring (6) is fixedly installed at the inner bottom end thereof. The other end of the first spring (6) presses the first spring (6) through the lower end of the pressure ring (5). The upper end of the pressure ring (5) is connected to the dynamic ring (4). The upper end of the dynamic ring (4) is connected to the spring lower cover (33). The spring lower cover (33) and the spring upper cover (31) cooperate to press the lower end face and the upper end face of the second spring (32). The spring upper cover (31) is pressed by the seal housing cover (2). Corresponding threaded holes are provided on the flanges of the seal housing cover (2) and the seal housing (8), and the threaded holes are threadedly connected through the extension bolt (7).

[0005] The seal housing cover (2), the spring upper cover (31), the spring lower cover (33), the dynamic ring (4), the pressure ring (5), and the seal housing (8) are all provided with holes for wrapping the shaft (1) in the middle, and the size of the holes is the same as the cross-section of the shaft (1).

[0006] A groove is provided on the inner side of the seal housing cover (2), and a first sealing ring (21) is installed in the groove.

[0007] Grooves are provided on both the upper and lower end faces of the dynamic ring (4), and a second sealing ring (41) and a third sealing ring (42) are respectively installed in the grooves. After the second sealing ring (41) and the third sealing ring (42) are placed in the grooves, their heights are slightly higher than the upper and lower end faces of the dynamic ring (4).

[0008] A groove is provided on the inner side of the inner ring of the dynamic ring (4), and a fourth sealing ring (43) is installed in the groove. The width of the fourth sealing ring (43) is slightly larger than the depth of the groove. By being extruded and deformed in cooperation with the shaft (1), the dynamic ring (4) is tightly connected to the shaft (1).

[0009] The bottom end of the seal housing (8) is attached to the surface of the wastewater treatment water pump, and threaded holes corresponding to the threaded holes on the flange at the bottom end of the seal housing (8) are provided on the surface of the wastewater treatment water pump.

[0010] First, in the preparation stage, ensure that the surfaces of all components are clean, free of oil, impurities, and damage. Carefully check the integrity and flexibility of each sealing ring. Then, pass the sealing housing (8) through the shaft (1) and install the first spring (6) at the inner bottom end of the sealing housing (8). Next, make the lower end of the pressure ring (5) contact the first spring (6), and gradually apply pressure to keep the first spring (6) in a compressed state, ensuring that the contact between the pressure ring (5) and the first spring (6) is tight and stable. After that, install the second sealing ring (41) and the third sealing ring (42) in the grooves on the upper and lower end faces of the moving ring (4) respectively. After these two sealing rings are placed in the grooves, their heights should be slightly higher than the upper and lower end faces of the moving ring (4) to enhance the sealing effect. Install the fourth sealing ring (43) in the groove on the inner side of the inner ring of the moving ring (4), and the width of the fourth sealing ring (43) should be slightly larger than the depth of the groove. Through cooperation with the shaft (1) and extrusion deformation, the moving ring (4) is tightly connected to the shaft (1). Connect the moving ring (4) to the upper end of the pressure ring (5). Next, connect the spring lower cover (33) to the upper end of the moving ring (4), make the spring lower cover (33) cooperate with the spring upper cover (31), and then place the second spring (32) between them, pressing the lower end face and the upper end face of the second spring (32). Then, install the first sealing ring (21) in the groove on the inner side of the sealing housing cover (2). Pass the sealing housing cover (2) through the shaft (1) to press the spring upper cover (31), and use the extended bolt (7) to thread-connect the sealing housing cover (2) to the corresponding threaded holes on the flange of the sealing housing (8) and pass through the housing of the wastewater treatment water pump.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] The bi-directional spring can maintain the uniform pressure of the sealing surface during vibration, ensure the reliability of the seal, reduce the risk of wastewater leakage, and can also reduce the transmission of vibration to the water pump housing and surrounding structures, reduce the noise level, and improve the working environment.

[0013] The sealing housing cover and the flange of the sealing housing are thread-connected by the extended bolt, which facilitates the installation and disassembly of the components. When maintenance or component replacement is required, the operation is relatively simple, saving time and labor costs.

[0014] The bottom end of the sealing housing can be closely attached to the surface of the wastewater treatment water pump and connected through the corresponding threaded holes, which can adapt to water pumps of different models and specifications and has strong versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional view of a shaft seal assembly for a wastewater treatment water pump of the present utility model;

[0016] Figure 2This is a three-dimensional sectional view of the shaft seal assembly structure for a wastewater treatment pump of the present utility model;

[0017] Figure 3 This is an exploded three-dimensional view of the shaft seal assembly structure for a wastewater treatment pump of the present utility model;

[0018] Figure 4 This is an exploded three-dimensional sectional view of the shaft seal assembly structure for a wastewater treatment pump of the present utility model;

[0019] In the figure: 1. Shaft; 2. Sealing housing cover; 31. Upper spring cover; 32. Second spring; 33. Lower spring cover; 4. Dynamic ring; 41. Second sealing ring; 42. Third sealing ring; 43. Fourth sealing ring; 5. Pressure ring; 6. First spring; 7. Extended bolt; 8. Sealing housing. Specific implementation method

[0020] Next, the technical solutions in the embodiments of the present utility model will be fully described in conjunction with the accompanying drawings in the embodiments of the present utility model.

[0021] As shown in the figure, a shaft seal assembly for a wastewater treatment pump includes a shaft (1), a sealing housing (8), a sealing housing cover (2), a dynamic ring (4), several springs, and several sealing rings. It is characterized in that it further includes a pressure ring (5), an extended bolt (7), an upper spring cover (31), and a lower spring cover (33); the sealing housing (8) is a cylindrical body, and a first spring (6) is fixedly installed at its inner bottom end. The other end of the first spring (6) is pressed by the lower end of the pressure ring (5). The upper end of the pressure ring (5) is connected to the dynamic ring (4). The upper end of the dynamic ring (4) is connected to the lower spring cover (33). The lower spring cover (33) and the upper spring cover (31) cooperate to press the lower end face and the upper end face of the second spring (32). The upper spring cover (31) is pressed by the sealing housing cover (2). Corresponding threaded holes are provided on the flanges of the sealing housing cover (2) and the sealing housing (8), and the threaded holes are threadedly connected by the extended bolt (7).

[0022] Holes for wrapping the shaft (1) are provided in the middle of the sealing housing cover (2), the upper spring cover (31), the lower spring cover (33), the dynamic ring (4), the pressure ring (5), and the sealing housing (8), and the sizes of the holes are the same as the cross-section of the shaft (1).

[0023] A groove is provided on the inner side of the sealing housing cover (2), and a first sealing ring (21) is installed in the groove.

[0024] The upper and lower end faces of the moving ring (4) are both provided with grooves, and a second sealing ring (41) and a third sealing ring (42) are respectively installed in the grooves. After the second sealing ring (41) and the third sealing ring (42) are placed in the grooves, their heights are slightly higher than the upper and lower end faces of the moving ring (4).

[0025] An inner ring of the moving ring (4) is provided with a groove on the inner side, and a fourth sealing ring (43) is installed in the groove. The width of the fourth sealing ring (43) is slightly larger than the depth of the groove. By being squeezed and deformed in cooperation with the shaft (1), the moving ring (4) is tightly connected to the shaft (1).

[0026] The bottom end of the sealing housing (8) is attached to the surface of the wastewater treatment water pump, and threaded holes corresponding to the threaded holes on the flange at the bottom end of the sealing housing (8) are provided on the surface of the wastewater treatment water pump.

[0027] First, in the preparation stage, ensure that the surfaces of all components are clean, free of oil, impurities and damage. Carefully check the integrity and flexibility of each sealing ring. Then, pass the sealing housing (8) through the shaft (1) and install the first spring (6) at the inner bottom end of the sealing housing (8). Next, bring the lower end of the pressure ring (5) into contact with the first spring (6), and gradually apply pressure to keep the first spring (6) in a compressed state, ensuring that the contact between the pressure ring (5) and the first spring (6) is tight and stable. After that, install the second sealing ring (41) and the third sealing ring (42) in the grooves on the upper and lower end faces of the moving ring (4) respectively. After these two sealing rings are placed in the grooves, their heights should be slightly higher than the upper and lower end faces of the moving ring (4) to enhance the sealing effect. Install the fourth sealing ring (43) in the groove on the inner side of the inner ring of the moving ring (4), and the width of the fourth sealing ring (43) should be slightly larger than the depth of the groove. By being squeezed and deformed in cooperation with the shaft (1), the moving ring (4) is tightly connected to the shaft (1). Connect the moving ring (4) to the upper end of the pressure ring (5). Next, connect the spring lower cover (33) to the upper end of the moving ring (4), make the spring lower cover (33) cooperate with the spring upper cover (31), and then place the second spring (32) between them, pressing the lower end face and the upper end face of the second spring (32). Then, install the first sealing ring (21) in the groove on the inner side of the sealing housing cover (2), pass the sealing housing cover (2) through the shaft (1) to press the spring upper cover (31), and use the extension bolt (7) to thread-connect the sealing housing cover (2) to the corresponding threaded holes on the flange of the sealing housing (8) and pass through the surface of the wastewater treatment water pump.

Claims

1. A shaft seal assembly for a wastewater treatment pump, comprising a shaft (1), a seal housing (8), a seal housing cover (2), a moving ring (4), a plurality of springs, and a plurality of sealing rings, characterized in that: The sealing housing (8) is a cylindrical body, and a first spring (6) is fixedly mounted at the bottom end thereof. The other end of the first spring (6) is pressed against the first spring (6) through the lower end of the pressure ring (5). The upper end of the pressure ring (5) is connected to a moving ring (4). The upper end of the moving ring (4) is connected to the lower spring cover (33). The lower spring cover (33) and the upper spring cover (31) cooperate to press against the lower end surface and the upper end surface of the second spring (32). The upper spring cover (31) is pressed against the sealing housing cover (2). The sealing housing cover (2) and the flange of the sealing housing (8) are provided with corresponding threaded holes, and the threaded holes are threadedly connected through the lengthened bolts (7).

2. A shaft seal assembly for a wastewater treatment pump according to claim 1, characterized in that: The sealing housing cover (2), the spring upper cover (31), the spring lower cover (33), the moving ring (4), the pressure ring (5), and the sealing housing (8) are all provided with holes in the middle for wrapping the shaft (1), and the size of the holes is consistent with the cross section of the shaft (1).

3. A shaft seal assembly for a wastewater treatment pump according to claim 1, characterized in that: The inner side of the sealing housing cover (2) is provided with a groove, and a first sealing ring (21) is installed in the groove.

4. A shaft seal assembly for a wastewater treatment pump according to claim 1, characterized in that: The upper and lower end surfaces of the movable ring (4) are both provided with grooves, and the second sealing ring (41) and the third sealing ring (42) are respectively installed in the grooves. After the second sealing ring (41) and the third sealing ring (42) are placed in the grooves, their heights are slightly higher than the upper and lower end surfaces of the movable ring (4).

5. The shaft seal assembly for a wastewater treatment pump according to claim 1, characterized in that: A groove is provided on the inner side of the inner ring of the movable ring (4), and a fourth sealing ring (43) is installed in the groove. The width of the fourth sealing ring (43) is slightly greater than the depth of the groove. The movable ring (4) is tightly connected to the shaft (1) by being squeezed and deformed in cooperation with the shaft (1).

6. A shaft seal assembly for a wastewater treatment pump according to claim 1, characterized in that: The bottom end of the sealing shell (8) is fitted to the casing of the wastewater treatment pump, and threaded holes corresponding to the threaded holes on the bottom flange of the sealing shell (8) are provided on the surface of the wastewater treatment pump.

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